Umbrella cap



FIG. 1 is a front view of an umbrella cap embodying my new design;

FIG. 2 is a right side view of the umbrella cap of FIG. 1;

FIG. 3 is a rear view of the umbrella cap of FIG. 1;

FIG. 4 is a left side view of the umbrella cap of FIG. 1;

FIG. 5 is a top view of the umbrella cap of FIG. 1; and,

FIG. 6 is an enlarged top view of the umbrella cap shown in FIG. 5. 

CLAIM The ornamental design for an umbrella cap, as shown and described. 